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Liu LW, Hu SY, Dou YP, et al. Nonlinear optical properties of near-infrared region Ag2S quantum dots pumped by nanosecond laser pulses. Beilstein J Nanotechnol. 2015;6:1781-7doi: 10.3762/bjnano.6.182.
Liu, L. W., Hu, S. Y., Dou, Y. P., Liu, T. H., Lin, J. Q., & Wang, Y. (2015). Nonlinear optical properties of near-infrared region Ag2S quantum dots pumped by nanosecond laser pulses. Beilstein journal of nanotechnology, 61781-7. https://doi.org/10.3762/bjnano.6.182
Liu, Li-Wei, et al. "Nonlinear optical properties of near-infrared region Ag2S quantum dots pumped by nanosecond laser pulses." Beilstein journal of nanotechnology vol. 6 (2015): 1781-7. doi: https://doi.org/10.3762/bjnano.6.182
Liu LW, Hu SY, Dou YP, Liu TH, Lin JQ, Wang Y. Nonlinear optical properties of near-infrared region Ag2S quantum dots pumped by nanosecond laser pulses. Beilstein J Nanotechnol. 2015 Aug 24;6:1781-7. doi: 10.3762/bjnano.6.182. eCollection 2015. PMID: 26425430; PMCID: PMC4578410.
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Beilstein J Nanotechnol. 2015 Aug 24;6:1781-7. doi: 10.3762/bjnano.6.182. eCollection 2015.

Nonlinear optical properties of near-infrared region Ag2S quantum dots pumped by nanosecond laser pulses.

Beilstein journal of nanotechnology

Li-Wei Liu, Si-Yi Hu, Yin-Ping Dou, Tian-Hang Liu, Jing-Quan Lin, Yue Wang

Affiliations

  1. School of Science, Changchun University of Science and Technology, Changchun, Jilin, 130022, China ; International Joint Research Center for Nanophotonics and Biophotonics, Changchun, Jilin, 130022, China.
  2. School of Science, Changchun University of Science and Technology, Changchun, Jilin, 130022, China.

PMID: 26425430 PMCID: PMC4578410 DOI: 10.3762/bjnano.6.182

Abstract

This study investigates near-infrared region Ag2S quantum dots (QDs) and their nonlinear optical response under 532 nm nanosecond laser pulses. Our experimental result shows that nonlinear transmission is reduced from 0.084 to 0.04. The observed narrowing behavior of the output pulse width shows superior optical limiting. We discuss the physical mechanisms responsible for the nonlinear optical response of the QDs. The average size of the nanocrystals was 5.5 nm. Our results suggest the possibility of using these Ag2S QDs for photoelectric, biosensor, optical ranging, and self-adaptive technologies.

Keywords: nonlinear optics; quantum dots; silver sulfide (Ag2S); strong absorption

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